Fastening for covers of ships&#39; hatches



Aug. 31 1926.

E. H. LAW ET AL FSTENING FOR COVERS OF SHIPS) HATCHES lFiled March 6. 1926 Fig. 5,

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Patented Aug. 31, 1926.

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FASTENNG FR COV OF SHIPS HATGHES.

Application led March 6, m26, Serial No.

The various methods adopted for covering ships hatches heretofore have had vthe disadvantage ot the fastenings being` of such a nature that there is a liability of the loss of parts of the fastening by reason of the same becoming detached from the hatch and 'furthermore such tastenings have been complicated, leading in many instances to the hatch boards which form the cover being dependent entirely upon the tarpaulin which is usually slung over the same keeping the boards in situ.

In the construction of hatches generally mid-way of the hatch (or at other suitable intervals) is placeda transverse hatch web, bar or bridge of T section which divides the hatch into two and atllcrds means for suliipoiting the inner ends ot the timbers or boards that form the cover to the hatch, at the ends of the hatch are provided angle iron bars that serve the purpose ot supporting the outer ends of the said boards or sectional covers which have been secured in position by transversely disposed angle and T bars the horizontal members of which overlap the ends of said covers, the ends of said locking bars being slid into sockets provided on the one side of the hatch whilst the opposite ends of said bars have been se-- cured by bolts and locks to prevent their removal.

The improvements forming the subject. matter of the present invention relate to this type ot fastening and in accordance therewith to devise a simple device whereby the said boards may be securely held in their respective places on their supports so as to form a cover to the hatch which can only be removed when the device is unastened and detached.

Given a hatch constructed as above described with the central transverse web or T-bar and transverse angles at the ends for supporting the sectional cover preferably the fastening is divided into six separate elements of a similar character and the angle irons at the ends of the hatch, as also the central T-bar, are provided with slots for example say three, with which each locking element engages.

Each of the end locking bar elements com-1 prises a strip of metal of more or less right angle section with depending hooks that engage in the slots in the aforesaid supporting angles the said hooks being ot such nature as to engage with the endS Ot said 92,7417, and in Great Britain March 3, 1925.

slots when the element is slid in a parallel plane to the angles, the horizontally dis` posed member oi' the angle element engaging with or resting uponthe ends ot the several boards or sectional covers which are thereby held in place. The central locking element instead of being ot right angle sec-- tion is of a similar character but of T -section and obviously will cover or hold the inner ends of the boards to form the cover ol the hatch on both sides of the central or intermediate bridge of the hatch, any convenient means may be employed for the retention of said locking elements in the locked position such as toggle bolts for example.

In the accompanying sheet et' drawings is illustrated the fastening according to the present invention as applied to a large hatch having two transverse webs dividing the hatch into three parts.

Figure 1 is a plan of the hatch showing one half ot the cover removed.

Figure 2 is a halt-section of Figure l.

Figure 3 is a detail section through one of the hatch webs.l

Figure 4 is an elevation et hatch web.

Figure 5 is a sectional elevation talren through the side of the hatch.

Figures 6 and 7 show the application of the invention to known types of hatch cover end supports.

Figures 3 to 7 are drawn to a larger scale than Figures 1 and 2.

Referring now to Figures 1 and 2 ot the drawing a is the hatch sides and b the ends, c represents the hatch webs having angle rest bars e for supporting the inner ends ot 'the boards of the hatch cover (Z. 1

In the hatch illustrated three intermediate supports f are provided for the cover d.

The ends are provided with angle rest bars g 'for supporting the outer ends of the cover boards. A method of securing the cover Z to the hatch by means of locking bars according to the present invention is shown in detail in Figures 3 to 7 to which reference may now be made.

In Figures 8 to 5 the locking bar 7L is of T section and has two depending hooks i autogenously welded thereto, but the hooks may be riveted or secured by any other suitable means, the said hooks project through suitable slots j in the rest bars e and are provided with projections z" adapted to engage the horizontal. member of the bars e when part of the lll() Cil .7c is of usual construction with slotted end Within -vvhiclris pivotally mounted the. T headed member t (Figures 3 and 5) that is raised into alignment with the aXis .ofthe bolt 7c 'for Withdrawal but normally isV disposed transversely thereof. Cavities .p are cut or scooped out of the cover boards to facilitate insertion and removal otthe'bolts la. The bolts la .maybe preferably secured by chains to the hatch sides or tothe lochn ing bars to prevent vloss or misplacement rot same and instead ottog'gle bolts ordinary screwed bolts and nuts may be used or other suitable secu-ring devices such .for example as the key or pin c shown in dotted lines Figure 4L which is passed through a hole provided theretor in the locking bar .hand depends through the part or' the slot .j at the rear of the hook 1l when it is in the locked position.

Figures 6 and 7` illustra-te two known types ot hatch cover end supports. In Figure @the supportingmember Z is of Z-section and the loc ringbar m oit angle section. The bolt 7o is `passedthroughfa. lug m, which is tapered so that When the bolt ZJ is Withdrawn theV bar m can be removed bysliding it towai ds the side of the hatch and atthe same `time raising it slightly, the lhooks c' being shaped so as to permit this, as shown in Figure .7.

Presuming now it-is desired'toremove the other halt ot the cover al in kFigure l rthe toggle bolts .7c would :ilrst be removed .from the bars 7L` and m which can then be slid laterally towards theside ce ot the hatch until the hooks z' and their vprojections jican pass through the slots .7' after .Which thelbars and the cover can be removed. To replace the cover the boa-rds are replaced,.the hooks passed throught-he slots j slid'laterally away y i'rom the side to-fthe hatch, and thebolts 7c replaced.

For convenience thehatch covers Vmay be made in halt sections inthe case fot large hatches as shown in Figure 1 eachhalt being held or locked by bars hr and m which only extend halt-Way .across the cover d. The

slot-s j may in such casesbe cut on opposite sides of thetransverse Webs c as shown in 4 shaped dependences in said slots in their engaged position. r

2. A. fastening for covers ot-ships hatches comprising T bars the horizontally disposed members ot Which .rest upon the adjacent ends ot' the several sectional cover boa-rds Whilst'the vertically disposed members of said T bars carry hook shaped dependences that engage in slots providedin v'the intermediate cover'board bearers andmeans for the retention .of said hook shaped dependences in said slots in their engaged position.

3. A fastening for covers of ships hatches comprising rolled bars Withhorizontallyr and vertically depending disposed vmembers the said horizontal members resting upon "the ends of the several sectional cover boards Whilst the vertically depending Adisposed members carry hook shaped dependences that engage with slots providedvin the cover board bearers fixed to the sides and vintermediate transverse bearers of the .hatch and toggle boltsto .secure said bars tosaid sides and transverse bearersot' the hatch and retain the hookshaped dependences in .their engaged position. if In testimony :whereof We aliix our signatures.

EDWARD HUMBLE LAW. ALEXANDER ramiaunn 

